X0306 4 2021-01-03 0 0001607678 Viking Therapeutics, Inc. VKTX 0001614578 Lian Brian C/O VIKING THERAPEUTICS, INC. 12340 EL CAMINO REAL, SUITE 250 SAN DIEGO CA 92130 1 1 0 0 President & CEO Common Stock, par value $0.00001 per share 2021-01-03 4 F 0 31545 5.63 D 1712432 D Common Stock, par value $0.00001 per share 2021-01-04 4 A 0 164000 0.00 A 1876432 D Common Stock, par value $0.00001 per share 2021-01-04 4 A 0 40333 0.00 A 1916765 D Common Stock, par value $0.00001 per share 2021-01-04 4 F 0 16973 5.80 D 1899792 D Stock Option (Right to Buy) 5.80 2021-01-04 4 A 0 369000 0.00 A 2022-01-04 2031-01-04 Common Stock 369000 369000 D These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations upon the vesting of certain shares of restricted stock units. Includes 1,614 shares acquired on November 20, 2020 pursuant to the Issuer's 2014 Employee Stock Purchase Plan. Represents a restricted stock unit award ("RSU") of common stock under the Issuer's 2014 Equity Incentive Plan. One-third of the shares subject to the RSU shall vest on each one year anniversary of the grant date of the award. The reported securities were subject to a performance restricted stock unit award that was granted on January 3, 2019, 33.33% of which vested on January 4, 2021 upon the achievement of a non-financial performance goal. These shares were withheld by the Issuer in order to satisfy certain tax withholding obligations in connection with the issuance of shares upon the vesting of certain shares of common stock subject to a performance restricted stock unit award. 25% of the shares subject to the option will vest on each anniversary of the grant date. /s/ Michael Morneau, as Attorney-in-Fact 2021-01-06